Method for rapidly modifying cellulose fiber by microwave and application thereof

A cellulose fiber and fast technology, applied in the field of water treatment, can solve the problems of large flow resistance, difficulty in application, lack of emergency treatment technology, and low adsorption capacity of disposal materials, so as to solve the problems of improving disposal efficiency and response speed, shortening preparation time, The effect of saving reaction raw materials

Inactive Publication Date: 2016-11-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the practical problems such as lack of emergency treatment technology for arsenic pollution in groundwater, low adsorption capacity of disposal materials or difficulty in application due to large flow resistance, the present invention provides a method and application of microwave rapid modification of cellulose fiber

Method used

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  • Method for rapidly modifying cellulose fiber by microwave and application thereof
  • Method for rapidly modifying cellulose fiber by microwave and application thereof
  • Method for rapidly modifying cellulose fiber by microwave and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] In this embodiment, modified cellulose fiber is used as the raw material for adsorption, and As(III) ions are selected as the target pollutant. The specific technical scheme is as follows:

[0037] 1. Activation of fibrils

[0038] Weigh 1 g of cellulose fiber, add 100 mL of 10% NaOH aqueous solution ( V:V ), mixed thoroughly and then transferred to a microwave reaction bottle, set the microwave power to 200 W, the heating temperature to 2 min×5 groups, a total of 10 min, with an interval of 30 s between the two groups to prevent the explosion caused by the high temperature. boil. After the reaction is completed, the activated fibers are taken out, washed with hot water and ethanol to neutrality, and dried in a drying oven at 60° C. to constant weight.

[0039] 2. Microwave-assisted cross-linking of activated fibers

[0040] After fully mixing 1 g of activated cellulose fiber with 25 mL of epichlorohydrin, add it into a reaction flask containing 25 mL of dimethyl sul...

Embodiment 2

[0048] In this embodiment, modified cellulose fibers are used as adsorption raw materials, and As(V) ions are selected as target pollutants. The specific technical scheme is as follows:

[0049] 1. Activation of fibrils

[0050] Weigh 1 g of cellulose fiber, add 100 mL of 10% NaOH aqueous solution ( V:V ), mixed thoroughly and then transferred to a microwave reaction bottle, set the microwave power to 200 W, the heating temperature to 2 min×5 groups, a total of 10 min, with an interval of 30 s between the two groups to prevent the explosion caused by the high temperature. boil. After the reaction is completed, the activated fibers are taken out, washed with hot water and ethanol to neutrality, and dried in a drying oven at 60° C. to constant weight.

[0051] 2. Microwave-assisted cross-linking of activated fibers

[0052] After fully mixing 1 g of activated cellulose fiber with 25 mL of epichlorohydrin, add it into a reaction flask containing 25 mL of dimethyl sulfoxide, tr...

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Abstract

The invention discloses a method for rapidly modifying cellulose fiber by microwave and an application thereof. Functional molecules are grafted to the surface of crosslinked cellulose fiber by assisted microwave, the modified cellulose fiber containing a large amount of amine groups for adsorbing arsenic ions with a high adsorption capacity is prepared, and the modified cellulose fiber is used for arsenic pollution of underground water and conventional arsenic waste water treatment for effectively removing arsenic pollution in water body. The method can be used for rapidly preparing the biomass adsorption material with good on-site emergency disposal applicability and environmental friendliness; the cellulose fiber which is prepared by cellulose is used as a raw material, wherein a large amount of cellulose exists in the nature, so that waste is changed into valuables; the microwave-assisted method is used for modification, raw materials are saved and preparation time is greatly shortened, industrialization is easy to realize, and emergency disposal requirements are met.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a microwave-assisted rapid preparation method and application of modified cellulose fibers containing polyamine groups with high adsorption capacity for arsenic ions. Background technique [0002] The problem of arsenic pollution around the world has attracted people's attention. At present, the arsenic removal methods reported at home and abroad include flocculation precipitation, ion exchange, oxidation and membrane separation. Among them, the adsorption method has become the most widely used method for removing arsenic in industrial production and treatment of drinking water due to its advantages of simple preparation, easy implementation and good removal effect. Common materials used to adsorb arsenic in water include activated carbon, minerals, soot, etc., but these methods are determined to be unable to effectively deal with trace arsenic, and the cost is high. It i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F103/06C02F101/10
CPCB01J20/24C02F1/286C02F2101/103C02F2103/06
Inventor 张广山王鹏邓圣陈述伟胡奇
Owner HARBIN INST OF TECH
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